Adopts a gimmick gun barrel moving up and down on both the left and right.

Comes with hand weapons and parts, can also be fit into normal Jesta.

RGM-96X Jesta Cannon wikipedia

The RGM-96X Jesta Cannon is an Earth Federation Mobile suit from the Novel and OVA Mobile Suit Gundam Unicorn, used by the Londo Bell task force.

The Jesta Cannon is a heavy assault variant of the standard RGM-96X Jesta. The Jesta Cannon features additional weapons systems such as a multi-launcher, an enhanced beam rifle, improved weapons fire-control systems, and extra armor sections around the frame. The extra armor can be purged allowing the Jesta Cannon to adapt to certain situations.

Like the original Jesta unit, the Jesta Cannon possesses higher performance than standard Federation mobile suits.